pereins



(No Model.) 3 Sheets-Sheet 1.

J.. B. PERKINS. MACHINE FOR FINISHING THE EDGES 0P TUBE BLANKS. No.469,977. Patented Mar. 1, 1892.

WITNESSES (No Model.) 3' Sheets$ heet 2.

J. B. PERKINS. V MACHINE FOR FINISHING THE EDGES OF TUBE BLANKS.

No. 469,977. Patented Mar. 1, 1892.

WI TJVESSES (No Model.) 3 Sheets-Sheet 3.

J. B. PERRINS.

MACHINE FOR FINISHING THE EDGBS 0F TUBE BLANKS.

No. 469,977. Patented Mar. 1, 1892.

. .llllH UNITED STATES PATENTOFFICE.

JOHN B. PERRINS, OF SEYMOUR, CONNECTICUT, ASSIGNOR TO THE SEYMOURMANUFACTURING COMPANY, OF SAME PLACE.

MACHINE FOR FINISHING THE EDGES OF TUBE-BLANKS.

SPECIFICATION forming part of Letters Patent No. 469,977, dated March 1,1892. Application filed August 21, 1891. Serial No. &O3.3 31. (No model.

To all whom it may concern: forms no portion of my present invention, I

' le it known that I, JOHN B. PERRINS, a have omitted feeding mechanismand have citizen of the United States, residing at Seysimply illustratedthe operative parts of the mour, in the county of New Haven and Statemachine,itbeing understood that tube-blanks 5 of Connecticut,haveinvented certain new and may be fed to the machine in any suitable oruseful Improvements in Machines for Finish-' preferred manner.

ing the Edges of Tube-Blanks; and I do here 1 denotes the bed of themachine, which is by declare the following to be a full, clear,supported upon suitable legs 2.

and exact description of the invention, such 3 is the shaft, to whichpower is applied by 10 as will enable others skilled in the art to whicha belt (not shown) running over a pulley 4.

it appertains to make and use the same. This shaftis journaled in boxes5 upon stand- My invention has for its object to produce ards 6,extending upward from the bed. amachine slmpleand inexpensiveinconstruc- 7 is a vertically-movable frame consistlng,

. t-ion and rapid and effective in operation for preferably, of sidebars 7, with a web 7 bei 5 finishing the edges of tube-blankspreparatween them. Both ends of the sidebars are tory to brazing orsoldering. provided with boxes 8, one end of the frame It is of coursewell understood by those being supported by shaft 3, which passesfamiliar with the art that the brazed tubing through the boxes at thatend. of commerce is made by rolling a suitable 9 is a shaft journaled inthe boxes at the 2o strip of metal into cylindrical form and then otherend of the side bars, and 10 is a rotary brazing the edges together. Asit is found cutter carried by said shaft. The special necessary inpractice to smooth off and bevel form of the cutter is not of theessence of my the edges of the blanks before brazing, it has invention.It is sufficient to say that the cutbeen customary for an operator tofinish both ter is a disk provided on its periphery with 25 edges byhand with a scraper. This ope'rasuitable cutting-teeth 10. Power isapplied tion adds seriously to the cost of production,- to this shaft bya belt (not shown) extending as considerable time is consumed infinishfrom a pulley 11 on shaft 3 to a pulley 12 on ing the edges of themetal, the expense being shaft 9. p greatly increased, furthermore, bythe fact 13 is a standard projecting upward from 30 that the operationof finishing the edges can the bed, to which it is rigidly secured bybolts only be performed by skilled workmen. 1t. At the upper end of thisstandard is a M y present machine dispenses entirely with curved slot15. a hand labor in finishing the edges of metal 16 isan enlargementcast upon one of the and produces. very much better results, as, arms 7,and 17 astud extending outward from 35 both .edges are not only finishedperfectly this enlargement and passing through slot 15. smooth,but areleft straight and parallel from The outer end of this stud isscrew-threaded end to end. and is engaged by a lock-nut 18, which is Iwill now describe my novel machine, repreferably provided with a handle18 for ferring by numerals to the accompanying convenience in operation.Should it be re- 4o drawings, forming part of this specification, quiredat any time to raise or lower the cutin which ter, lock-nut 18 isloosened and the frame Figurel is aplan view; Fig. 2, a side elevaraisedor lowered, as may be required to place tion; Fig. 3, an end elevationas seen from the cutter in the desired position. The parts wthe left inFig. 1; Fig. 4, a perspective of are then locked in position bytightening up 45 a short piece of tubing with the edges finthe lock-nut,and do not require to be changed ished ready for brazing, and Fig. 5 isa dein use unless tubes of another size or-uneven-' tail sectional viewillustrating the cutter-adness of slot are to be operated upon. justingmechanism. 19 denotes a set-screw in enlargement 16,

It is quite practicable to feed the rolled the lower end of which isadapted to engage mo 50 tube-blanks to the machine either automatianenlargement 20 (see Fig. 1) on the inner cally or by hand. As thefeeding mechanism side of standard 13 and serves as a stop to limit thedownward moyement of the frame. This stop is simply a safeguardto avoidthe possibility of the cutter dropping down and l the teeth beingdamaged: by contact with some portion of the machine should lock-nut 18become accidentally loosened, and more especially when the lock-nut isnot used at all and the frame and cutter are controlled by a foot-lever21.

22 is a lever, one endof which .ispivoted between ears 23 (see Fig. 2,in connectionwith dotted lines in Fig. 1) on the under side of one ofthe side bars 7.

24 is a rod extending up through the bed of the machine, one end ofwhich is connected. to the opposite end of lever 22 and the other to thefoot-lever. Lever 22 has its fulcrum on a stud 25 at the upper endofa.link 26, the lower end of which is pivoted toa boss.27, extendingoutward from standard 13. When it is not desired to use the foot-lever,the

frame is adjusted in the manner already de-; scribed to place the cutterin operative position and lock it there. For many classes of;

work skilled operators prefer not to havethel frame locked in position,but subject to the control of the foot-lever. Under such circumstancesthe lock-nut is not used.

In inserting a tube the operator raises the cutter by means of thefoot-lever, and in the same manner retains the cutter in operativeposition while finishing the edges of a blank, it being of courseapparent from Fig. 2 that downward pressure upon the foot-lever willraise the cutter. The engagement of stop 19 with enlargement 20 preventsthe possibility of injury to the cutter should it drop down.

In order to insure that the frame and cutter shall respond instantly tothe movements of the foot-lever, I provide a spring 52, one end of whichis connected to the bed, the other to the frame, (see Figs. 1 and 2,) sothat when the foot-lever is pressed down the upward movement of theframe and cutter will be against the power of this spring, which willact to draw the frame and cutter downward.

the instant pressure upon the foot-lever is relieved.

The tube to be operated upon is passed into the machine in eitherdirection and rests upon supporting-rollers 28, carried by yokes 29 atopposite ends of the machine. The yokes are provided with shanks 30,which extend down through the bed of the machine and are provided neartheir lower ends with pins .31. These pins engage oblique. slots in;aslide 33, supported by guides 34 under the bed. The outer end of thisslide is given a half-turn and is pivoted to a hand-lever 35 at'the endof the machine. It will be seen that oscillation of this lever will actto raiseor lower the I yokes and rollers 28 simultaneously. The tubewhile being acted upon-by the cutter is held against lateral movementbyguide-rollers 36, carried by slides 37,snpported bysuitable brackets38, which are castintegralwith or.

rigidly secured to the bed. The special form of these brackets is ofcourse nonessential. InFjgBIhave shownthe brackets as cast integral andconnected at the bottom, shank 30 of the yok'h at this end of themachine ported thereby. Theouterv ends of slides 37 passing through thecasting and being supare bent at right angles to receive adjustingscrews 39, which are threaded to engage the brackets, the angularportion of the slide bcing held between collars 40. so that rotation ofthe ad justing-screws will move the slides, and with them theguide-rollers, in or out, as may be required. i

41' denotes hand levers upon the a'dj ustingscrews 'for convenience inoperation.

In order to retain the tube against the slightest oscillatory movementqvhile; it is being operated upon, I provide rollers 42, madethin'enough to pass between the-edgesof-the blank, and place oneof saidrollersuponeaeh side of the cutter. These rollers arec'arried by arms43, extending inward from vertical slides 43, which move in ways onopposite sides of one of f the brackets 38, the right bracket beingshown in Fig.3. This right bracket is provided with a vertical slot-.44through it from the front, as seen in Fig.3, said slot appearing only indottedlines in said figure, as it is covered by plate 43, and with avertical slot 45, at rightangles thereto, said slot 45 entering from thefront, as seen in-Fig. 2, and intersecting slot 44. 1 I

46 denotes a cross-piece lyingdnsloti l t, the outer ends of which arereducedandscrewtoo threaded to receive nuts .47. JI-hesenuts act toclamp slides 43 against thesho'ul'ders where the reduced ends ofthecross-piece terminate, so that when saidcross-piece is moved .up ordownsaid slides, and with them rollers 42, are moved up or downalso.

48 is a bolt in slot 45, the innerendof which engages the cross-piece,and 49 is a link, one end of which is pivoted on bolt48 and the otherona bolt 53,-which passesthrougha-slot 50 in a hand-lever 51,whichisitselt .pivoted on a bolt 54, engagingthe bed. It will beseenthat oscillation ofthe hand-lever will act to raise the link 49' andbolt .48, and with it the cross-piece and slides 43,'carrying rollers 42up or down, as may be requiredfor purposes of adjustment. 7

It will of course be apparent that the details of construction may bevaried to an;al most unlimited extent without departing fromtheprinciples of my invention.

1. The combination, with vertically-adjustable rollers 28 at oppositeends of the machine for supporting the .tube to be operatcd upon' andlaterally-adjustable guide-rollers 36 for holding it against-lateralmovemenn-of, avertically-movable frame, -a-rotary cutter carried bysaid. frame, and means,substantiallyas described and shown, forraisingand lowering the cutter.

2. The combination, with the adjustable rollers 28, by which the tube issupported in use, and adjustable rollers 36, by which it is held againstlateral movement,-of a vertically movable frame, a rotary cutter carriedby said largement 16 and a stud 17 projecting there-.

from, and the rotary cutter carried by'said frame, in combination with astandard 13, having a eu rved slot, through which said stud passes, anda nut 18, engaging said stud to lock the frame and cutter in anyrequired position.

4. In a machine of the class described, the vertically-movable framehaving an enlargement 16, a set-screw 19 in said enlargement, and arotary cutter carried by said frame, in combination with a standard 13,having an enlargement 20, adapted to be engaged by the set-screw tolimitthe downward movement of the frame, a spring 52, actingto draw theframe and cutter downward, a lever 22, pivoted to the frame, and afoot-lever and intermediate connections whereby the frame and cutter maybe raised against the power of the spring. i

5. The combination, with the verticallymovable frame, the cutter, andadjustable guide-rollers 36, of supporting-rollers 28, yokes in whichsaid rollers are mounted and which are provided with shanks 30, havingpins 31, and slide 33, having oblique slots 32 engaged by said pins, sothat movement of said slide will act to simultaneously raise or lowerthe supporting-rollers, as may be required.

6. The combination, with the verticallymovable frame, the cutter, andadjustable supporting-rollers 28, of guiderollers 36, slides by whichtheyare carried, brackets by which said slides are supported, and adjusting-screws engaging said slides, and brackets by which theguide-rollers are adjusted.

7. The com bination, with the verticallymovable frame, the cutter, andmeans, substantially as described and shown, for holding and guiding thetube-blank, of rollers 42, which pass between the edges of the blank,slides 43, having arms by which said rollers arecarrie'd, a brackethaving a vertical slot 44 through it and an intersecting slot 45 atright angles thereto, a cross-piece 46, lying in slot 44, to the outerends of which said slides are secured, a bolt in slot 45, engaging thecross-piece, a link pivoted to the outer end of said bolt, and ahand-lever pivoted to said link, whereby the cross-piece, and with itthe slides and rollers, may be raised or lowered simultaneously.

In testimony whereof Iaffix my signature in Dresence of two witnesses.

JOHN B. PERKINS.

